Tip structure and contact pin

Abstract

The tip structure of the present invention is a tip structure including an apex that is for contact to be used for conduction confirmation, and the tip structure includes a base material that includes an edge and is made of an iron alloy having a Cr content of 3 mass % or more; and a conductive layer that covers the base material. In the tip structure, the apex has a minimum curvature radius of 5 μm or less.

1 . A tip structure including an apex that is for contact to be used for conduction confirmation, the tip structure comprising:
 a base material that includes an edge and is made of an iron alloy having a Cr content of 3 mass % or more; and   a conductive layer that covers the base material,   wherein   the apex has a minimum curvature radius of 5 um or less.   
     
     
         2 . The tip structure according to  claim 1 , wherein the conductive layer contains at least one metal selected from the group consisting of gold, silver, tin, and platinum group metals. 
     
     
         3 . The tip structure according to  claim 1 , wherein the conductive layer includes two or more layers. 
     
     
         4 . The tip structure according to  claim 2 , wherein the conductive layer further contains at least one metal selected from the group consisting of palladium, cobalt, and nickel. 
     
     
         5 . The tip structure according to  claim 1 , further comprising a nickel layer between the base material and the conductive layer. 
     
     
         6 . The tip structure according to  claim 1 , wherein the base material has a Vickers hardness of 400 HV or more. 
     
     
         7 . The tip structure according to  claim 1 , wherein the conductive layer has a Vickers hardness of 1000 HV or less. 
     
     
         8 . A contact pin comprising the tip structure according to  claim 1 .